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Zhang Q, Li J, Pan X, Liu X, Gai H. Low-Numerical Aperture Microscope Objective Boosted by Liquid-Immersed Dielectric Microspheres for Quantum Dot-Based Digital Immunoassays. Anal Chem 2021; 93:12848-12853. [PMID: 34520178 DOI: 10.1021/acs.analchem.1c02709] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Quantum dot (QD)-based digital immunoassays play an important role in ultrasensitive biomarker detection. However, the requirement of an objective with a high numerical aperture (NA) limits the application of this immunoassay. Here, high-quality imaging of massive single-QDs was achieved by the combination of an air objective (20×/0.4 NA) and liquid-immersed microspheres (150 μm, n = 2.2). The signal-to-noise ratio was comparable to that of a 100×/1.4 NA oil objective. Digital analysis of prostate-specific antigen (PSA) was performed within the dynamic range of 0-50 ng/mL and a limit of detection of 0.17 ng/mL. The measured serum data from the PSA were close to the values provided by a hospital. Using a low-magnification and low-NA objective may reduce the barrier of microscopy miniaturization and is beneficial to popularize biomolecular digital analysis.
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Affiliation(s)
- Qingquan Zhang
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China
| | - Jiajia Li
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China
| | - Xiaoyan Pan
- Department of Laboratory Medicine, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou 310009, China
| | - Xiaojun Liu
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China
| | - Hongwei Gai
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China
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Fu S, Zhang T, Jiang H, Xu Y, Chen J, Zhang L, Su X. DNA nanotechnology enhanced single-molecule biosensing and imaging. Trends Analyt Chem 2021. [DOI: 10.1016/j.trac.2021.116267] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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3
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Ki J, Shim Y, Song JM. High-content cell death imaging using quantum dot-based TIRF microscopy for the determination of anticancer activity against breast cancer stem cell. JOURNAL OF BIOPHOTONICS 2017; 10:118-127. [PMID: 26768511 DOI: 10.1002/jbio.201500282] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2015] [Revised: 12/17/2015] [Accepted: 12/18/2015] [Indexed: 06/05/2023]
Abstract
We report a two color monitoring of drug-induced cell deaths using total internal reflection fluorescence (TIRF) as a novel method to determine anticancer activity. Instead of cancer cells, breast cancer stem cells (CSCs) were directly tested in the present assay to determine the effective concentration (EC50 ) values of camptothecin and cisplatin. Phosphatidylserine and HMGB1 protein were concurrently detected to observe apoptotic and necrotic cell death induced by anticancer drugs using quantum dot (Qdot)-antibody conjugates. Only 50-to-100 breast CSCs were consumed at each cell chamber due to the high sensitivity of Qdot-based TIRF. The high sensitivity of Qdot-based TIRF, that enables the consumption of a small number of cells, is advantageous for cost-effective large-scale drug screening. In addition, unlike MTT assay, this approach can provide a more uniform range of EC50 values because the average values of single breast CSCs fluorescence intensities are observed to acquire EC50 values as a function of dose. This research successfully demonstrated the possibility that Qdot-based TIRF can be widely used as an improved alternative to MTT assay for the determination of anticancer drug efficacies.
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Affiliation(s)
- Jieun Ki
- College of Pharmacy, Seoul National University, 1 Gwanak-ro, Gwanak-ku, Seoul, 151-742, South Korea
| | - Yumi Shim
- College of Pharmacy, Seoul National University, 1 Gwanak-ro, Gwanak-ku, Seoul, 151-742, South Korea
| | - Joon Myong Song
- College of Pharmacy, Seoul National University, 1 Gwanak-ro, Gwanak-ku, Seoul, 151-742, South Korea
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Tian Y, Kuzimenkova MV, Halle J, Wojdyr M, Diaz de Zerio Mendaza A, Larsson PO, Müller C, Scheblykin IG. Molecular Weight Determination by Counting Molecules. J Phys Chem Lett 2015; 6:923-927. [PMID: 26262846 DOI: 10.1021/acs.jpclett.5b00296] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Molecular weight (MW) is one of the most important characteristics of macromolecules. Sometimes, MW cannot be measured correctly by conventional methods like gel permeation chromatography (GPC) due to, for example, aggregation. We propose using single-molecule spectroscopy to measure the average MW simply by counting individual fluorescent molecules embedded in a thin matrix film at known mass concentration. We tested the method on dye molecules, a labeled protein, and the conjugated polymer MEH-PPV. We showed that GPC with polystyrene calibration overestimates the MW of large MEH-PPV molecules by 40 times due to chain aggregation and stiffness. This is a crucial observation for understanding correlations between the conjugated polymer length, photophysics and performances of devices. The method can measure the MW of fluorescent molecules, biological objects, and nanoparticles at ultimately low concentrations and does not need any reference; it is conformation-independent and has no limitations regarding the detected MW range.
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Affiliation(s)
| | | | | | | | - Amaia Diaz de Zerio Mendaza
- §Department of Chemistry and Chemical Engineering, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden
| | | | - Christian Müller
- §Department of Chemistry and Chemical Engineering, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden
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Bennett KM, Jo JI, Cabral H, Bakalova R, Aoki I. MR imaging techniques for nano-pathophysiology and theranostics. Adv Drug Deliv Rev 2014; 74:75-94. [PMID: 24787226 DOI: 10.1016/j.addr.2014.04.007] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2013] [Revised: 03/02/2014] [Accepted: 04/20/2014] [Indexed: 11/25/2022]
Abstract
The advent of nanoparticle DDSs (drug delivery systems, nano-DDSs) is opening new pathways to understanding physiology and pathophysiology at the nanometer scale. A nano-DDS can be used to deliver higher local concentrations of drugs to a target region and magnify therapeutic effects. However, interstitial cells or fibrosis in intractable tumors, as occurs in pancreatic or scirrhous stomach cancer, tend to impede nanoparticle delivery. Thus, it is critical to optimize the type and size of nanoparticles to reach the target. High-resolution 3D imaging provides a means of "seeing" the nanoparticle distribution and therapeutic effects. We introduce the concept of "nano-pathophysiological imaging" as a strategy for theranostics. The strategy consists of selecting an appropriate nano-DDS and rapidly evaluating drug effects in vivo to guide the next round of therapy. In this article we classify nano-DDSs by component carrier materials and present an overview of the significance of nano-pathophysiological MRI.
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Ding Y, Liu X, Zhu J, Wang L, Jiang W. Quantitative single-molecule detection of protein based on DNA tetrahedron fluorescent nanolabels. Talanta 2014; 125:393-9. [DOI: 10.1016/j.talanta.2014.03.032] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2013] [Revised: 03/10/2014] [Accepted: 03/13/2014] [Indexed: 11/28/2022]
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7
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Gomes SA, Vieira CS, Almeida DB, Santos-Mallet JR, Menna-Barreto RFS, Cesar CL, Feder D. CdTe and CdSe quantum dots cytotoxicity: a comparative study on microorganisms. SENSORS 2011; 11:11664-78. [PMID: 22247686 PMCID: PMC3252003 DOI: 10.3390/s111211664] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2011] [Revised: 11/26/2011] [Accepted: 12/09/2011] [Indexed: 11/16/2022]
Abstract
Quantum dots (QDs) are colloidal semiconductor nanocrystals of a few nanometers in diameter, being their size and shape controlled during the synthesis. They are synthesized from atoms of group II–VI or III–V of the periodic table, such as cadmium telluride (CdTe) or cadmium selenium (CdSe) forming nanoparticles with fluorescent characteristics superior to current fluorophores. The excellent optical characteristics of quantum dots make them applied widely in the field of life sciences. Cellular uptake of QDs, location and translocation as well as any biological consequence, such as cytotoxicity, stimulated a lot of scientific research in this area. Several studies pointed to the cytotoxic effect against micoorganisms. In this mini-review, we overviewed the synthesis and optical properties of QDs, and its advantages and bioapplications in the studies about microorganisms such as protozoa, bacteria, fungi and virus.
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Affiliation(s)
- Suzete A.O. Gomes
- Laboratório de Biologia de Insetos, GBG, Universidade Federal Fluminense—UFF, Niterói, RJ, CEP: 24210-130, Brazil; E-Mail: (S.A.O.G.)
| | - Cecilia Stahl Vieira
- Laboratório de Transmissores de Leishmanioses, Setor de Entomologia Médica e Forense, IOC-FIOCRUZ, Rio de Janeiro, RJ, CEP: 21040-360, Brazil; E-Mails: (C.S.V.); (J.R.S.-M.)
| | - Diogo B. Almeida
- Laboratório de Aplicações Biomédicas de Lasers, Departamento de Eletrônica Quântica, Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas, Campinas, SP, CEP: 13083-970, Brazil; E-Mails: (D.B.A.); (C.L.C.)
| | - Jacenir R. Santos-Mallet
- Laboratório de Transmissores de Leishmanioses, Setor de Entomologia Médica e Forense, IOC-FIOCRUZ, Rio de Janeiro, RJ, CEP: 21040-360, Brazil; E-Mails: (C.S.V.); (J.R.S.-M.)
| | - Rubem F. S. Menna-Barreto
- Laboratório de Biologia Celular, IOC-FIOCRUZ, Rio de Janeiro, RJ, CEP: 21040-360, Brazil; E-Mail: (R.F.S.M.-B.)
| | - Carlos L. Cesar
- Laboratório de Aplicações Biomédicas de Lasers, Departamento de Eletrônica Quântica, Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas, Campinas, SP, CEP: 13083-970, Brazil; E-Mails: (D.B.A.); (C.L.C.)
| | - Denise Feder
- Laboratório de Biologia de Insetos, GBG, Universidade Federal Fluminense—UFF, Niterói, RJ, CEP: 24210-130, Brazil; E-Mail: (S.A.O.G.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +55-21-2629-2285
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Xue Q, Jiang D, Wang L, Jiang W. Quantitative Detection of Single Molecules Using Enhancement of Dye/DNA Conjugate-Labeled Nanoparticles. Bioconjug Chem 2010; 21:1987-93. [DOI: 10.1021/bc100212w] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Qingwang Xue
- School of Chemistry and Chemical Engineering, Shandong University, 250100 Jinan, P.R. China, and School of Pharmacy, Shandong University, 250012 Jinan, P.R. China
| | - Dafeng Jiang
- School of Chemistry and Chemical Engineering, Shandong University, 250100 Jinan, P.R. China, and School of Pharmacy, Shandong University, 250012 Jinan, P.R. China
| | - Lei Wang
- School of Chemistry and Chemical Engineering, Shandong University, 250100 Jinan, P.R. China, and School of Pharmacy, Shandong University, 250012 Jinan, P.R. China
| | - Wei Jiang
- School of Chemistry and Chemical Engineering, Shandong University, 250100 Jinan, P.R. China, and School of Pharmacy, Shandong University, 250012 Jinan, P.R. China
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Jiang D, Liu C, Wang L, Jiang W. Fluorescence single-molecule counting assays for protein quantification using epi-fluorescence microscopy with quantum dots labeling. Anal Chim Acta 2010; 662:170-6. [DOI: 10.1016/j.aca.2010.01.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2009] [Revised: 01/07/2010] [Accepted: 01/11/2010] [Indexed: 11/26/2022]
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10
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Peterson EM, Harris JM. Quantitative Detection of Single Molecules in Fluorescence Microscopy Images. Anal Chem 2009; 82:189-96. [PMID: 19957961 DOI: 10.1021/ac901710t] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Eric M. Peterson
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112-0850
| | - Joel M. Harris
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112-0850
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